出版社：The International Institute for Science, Technology and Education (IISTE)
摘要：The effect of gas flaring on some phytochemicals and trace metals in Vernonia amygdalina in Obrikom, a gas flaring community (GF) and Rumualogu, a non gas flaring community (NGF) in Rivers state, Nigeria was investigated. There was significant increase (P>0.05) in the composition of alkaloid (NGF; 1.32±0.044 and GF; 3.10±0.001) and tannin (NGF; 0.03±0.001 and GF; 0.31±0.007) in the Vernonia amygdalina when the leaf samples from Rumualogu(NGF-Community) was compared with the Obrikom(GF-Community) samples. However, there was no significant difference (P<0.05) in the flavonoid (NGF; 0.79±0.012 and GF; 0.88±0.009 ) and saponin (NGF; 1.20±0.009 and GF; 1.27±0.018 ) compositions. There was significant increase (P>0.05) in the levels of Fe (2.21±0.01 to 2.96±0.01), Zn (0.86±0.01 to 1.10±0.01) and Pb (0.14±0.03 to 0.29±0.02) when the leaves grown in a non gas flaring site were compared with the gas flaring site samples. There was no significant difference in Cr concentration; Cr (0.01±0.01 to 0.02±0.01). Cadmium level was below detection limit (BDL) in the vegetable from both sites. The implication of these findings is a possible change on the nutritional and medicinal values of Vernonia amygdalina.
